global-handles.cc revision f91f0611dbaf29ca0f1d4aecb357ce243a19d2fa
1a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Copyright 2009 the V8 project authors. All rights reserved. 2b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Use of this source code is governed by a BSD-style license that can be 3b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// found in the LICENSE file. 4b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 5b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/global-handles.h" 6b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 7014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch#include "src/api.h" 8014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch#include "src/v8.h" 9b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/vm-state-inl.h" 10b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 11a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace v8 { 12a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace internal { 13a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1444f0eee88ff00398ff7f715fab053374d808c90dSteve Block 1544f0eee88ff00398ff7f715fab053374d808c90dSteve BlockObjectGroup::~ObjectGroup() { 16b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (info != NULL) info->Dispose(); 17b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch delete[] objects; 18b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 19b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 20b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 21b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochImplicitRefGroup::~ImplicitRefGroup() { 22b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch delete[] children; 2344f0eee88ff00398ff7f715fab053374d808c90dSteve Block} 2444f0eee88ff00398ff7f715fab053374d808c90dSteve Block 2544f0eee88ff00398ff7f715fab053374d808c90dSteve Block 263fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochclass GlobalHandles::Node { 27a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block public: 283fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // State transition diagram: 293fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // FREE -> NORMAL <-> WEAK -> PENDING -> NEAR_DEATH -> { NORMAL, WEAK, FREE } 303fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch enum State { 31b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FREE = 0, 32958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier NORMAL, // Normal global handle. 33958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier WEAK, // Flagged as weak but not yet finalized. 34958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier PENDING, // Has been recognized as only reachable by weak handles. 35958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier NEAR_DEATH, // Callback has informed the handle is near death. 36958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier NUMBER_OF_NODE_STATES 373fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch }; 38a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 393fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Maps handle location (slot) to the containing node. 403fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch static Node* FromLocation(Object** location) { 41014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(offsetof(Node, object_) == 0); 423fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch return reinterpret_cast<Node*>(location); 43d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 44d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 45b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Node() { 46014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(offsetof(Node, class_id_) == Internals::kNodeClassIdOffset); 47014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(offsetof(Node, flags_) == Internals::kNodeFlagsOffset); 48b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(static_cast<int>(NodeState::kMask) == 49b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Internals::kNodeStateMask); 50b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(WEAK == Internals::kNodeStateIsWeakValue); 51b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(PENDING == Internals::kNodeStateIsPendingValue); 52b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(NEAR_DEATH == Internals::kNodeStateIsNearDeathValue); 53b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(static_cast<int>(IsIndependent::kShift) == 54b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Internals::kNodeIsIndependentShift); 55b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(static_cast<int>(IsPartiallyDependent::kShift) == 56b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Internals::kNodeIsPartiallyDependentShift); 57014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch STATIC_ASSERT(static_cast<int>(IsActive::kShift) == 58014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Internals::kNodeIsActiveShift); 59b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 60a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 61b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#ifdef ENABLE_HANDLE_ZAPPING 623fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch ~Node() { 633fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // TODO(1428): if it's a weak handle we should have invoked its callback. 64a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Zap the values for eager trapping. 65b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_ = reinterpret_cast<Object*>(kGlobalHandleZapValue); 663fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch class_id_ = v8::HeapProfiler::kPersistentHandleNoClassId; 673fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch index_ = 0; 68b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_independent(false); 69014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (FLAG_scavenge_reclaim_unmodified_objects) { 70014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch set_active(false); 71014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } else { 72014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch set_partially_dependent(false); 73014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 74b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_in_new_space_list(false); 75a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block parameter_or_next_free_.next_free = NULL; 76b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch weak_callback_ = NULL; 773fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 78a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 793fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 803fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void Initialize(int index, Node** first_free) { 81014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch object_ = reinterpret_cast<Object*>(kGlobalHandleZapValue); 823fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch index_ = static_cast<uint8_t>(index); 83b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(static_cast<int>(index_) == index); 84b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_state(FREE); 85b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_in_new_space_list(false); 863fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch parameter_or_next_free_.next_free = *first_free; 873fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch *first_free = this; 88a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 89a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 90b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Acquire(Object* object) { 91b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(state() == FREE); 923fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch object_ = object; 933fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch class_id_ = v8::HeapProfiler::kPersistentHandleNoClassId; 94b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_independent(false); 95014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (FLAG_scavenge_reclaim_unmodified_objects) { 96014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch set_active(false); 97014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } else { 98014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch set_partially_dependent(false); 99014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 100b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_state(NORMAL); 1013fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch parameter_or_next_free_.parameter = NULL; 102b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch weak_callback_ = NULL; 103b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch IncreaseBlockUses(); 1043fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 1053fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 106958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier void Zap() { 107958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 108958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Zap the values for eager trapping. 109958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier object_ = reinterpret_cast<Object*>(kGlobalHandleZapValue); 110958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 111958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 112b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Release() { 113958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 114b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_state(FREE); 115b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Zap the values for eager trapping. 116b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_ = reinterpret_cast<Object*>(kGlobalHandleZapValue); 117b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch class_id_ = v8::HeapProfiler::kPersistentHandleNoClassId; 118b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_independent(false); 119014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (FLAG_scavenge_reclaim_unmodified_objects) { 120014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch set_active(false); 121014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } else { 122014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch set_partially_dependent(false); 123014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 124b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch weak_callback_ = NULL; 125b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DecreaseBlockUses(); 1263fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 1273fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 1283fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Object slot accessors. 1293fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Object* object() const { return object_; } 1303fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Object** location() { return &object_; } 1313fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Handle<Object> handle() { return Handle<Object>(location()); } 1323fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 1333fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Wrapper class ID accessors. 1343fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch bool has_wrapper_class_id() const { 1353fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch return class_id_ != v8::HeapProfiler::kPersistentHandleNoClassId; 136a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 137b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1383fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch uint16_t wrapper_class_id() const { return class_id_; } 139b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 140b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // State and flag accessors. 141b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 142b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch State state() const { 143b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return NodeState::decode(flags_); 144b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 145b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void set_state(State state) { 146b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch flags_ = NodeState::update(flags_, state); 1473fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 1483fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 149b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool is_independent() { 150b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return IsIndependent::decode(flags_); 151b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 152b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void set_independent(bool v) { 153b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch flags_ = IsIndependent::update(flags_, v); 154b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1553fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 156b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool is_partially_dependent() { 157014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch CHECK(!FLAG_scavenge_reclaim_unmodified_objects); 158b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return IsPartiallyDependent::decode(flags_); 159b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 160b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void set_partially_dependent(bool v) { 161014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch CHECK(!FLAG_scavenge_reclaim_unmodified_objects); 162b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch flags_ = IsPartiallyDependent::update(flags_, v); 163b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 164b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 165014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch bool is_active() { 166014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch CHECK(FLAG_scavenge_reclaim_unmodified_objects); 167014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch return IsActive::decode(flags_); 168014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 169014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch void set_active(bool v) { 170014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch CHECK(FLAG_scavenge_reclaim_unmodified_objects); 171014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch flags_ = IsActive::update(flags_, v); 172014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 173014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 174b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool is_in_new_space_list() { 175b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return IsInNewSpaceList::decode(flags_); 176b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 177b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void set_in_new_space_list(bool v) { 178b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch flags_ = IsInNewSpaceList::update(flags_, v); 179b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1803fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 181958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier WeaknessType weakness_type() const { 182958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return NodeWeaknessType::decode(flags_); 183958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 184958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier void set_weakness_type(WeaknessType weakness_type) { 185958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier flags_ = NodeWeaknessType::update(flags_, weakness_type); 186958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 187958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1883fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch bool IsNearDeath() const { 1893fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Check for PENDING to ensure correct answer when processing callbacks. 190b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return state() == PENDING || state() == NEAR_DEATH; 1913fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 1923fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 193b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool IsWeak() const { return state() == WEAK; } 1943fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 195958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier bool IsInUse() const { return state() != FREE; } 196958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 197bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch bool IsPendingPhantomCallback() const { 198bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch return state() == PENDING && 199bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch (weakness_type() == PHANTOM_WEAK || 200bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch weakness_type() == PHANTOM_WEAK_2_INTERNAL_FIELDS); 201bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } 202bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch 203bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch bool IsPendingPhantomResetHandle() const { 204bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch return state() == PENDING && weakness_type() == PHANTOM_WEAK_RESET_HANDLE; 205bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } 206bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch 207014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch bool IsRetainer() const { 208014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch return state() != FREE && 209bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch !(state() == NEAR_DEATH && weakness_type() != FINALIZER_WEAK); 210014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 211a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 212b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool IsStrongRetainer() const { return state() == NORMAL; } 2133fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 2143fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch bool IsWeakRetainer() const { 215014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch return state() == WEAK || state() == PENDING || 216bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch (state() == NEAR_DEATH && weakness_type() == FINALIZER_WEAK); 2173fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 2183fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 2193fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void MarkPending() { 220b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(state() == WEAK); 221b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_state(PENDING); 2223fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 2233fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 2243fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Independent flag accessors. 2253fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void MarkIndependent() { 226958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 227b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_independent(true); 2283fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 2293fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 230b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void MarkPartiallyDependent() { 231958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 232b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (GetGlobalHandles()->isolate()->heap()->InNewSpace(object_)) { 233b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_partially_dependent(true); 234b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 235b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 236b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void clear_partially_dependent() { set_partially_dependent(false); } 2373fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 2383fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Callback accessor. 239b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // TODO(svenpanne) Re-enable or nuke later. 240b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // WeakReferenceCallback callback() { return callback_; } 2413fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 2423fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Callback parameter accessors. 2433fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void set_parameter(void* parameter) { 244958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 2453fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch parameter_or_next_free_.parameter = parameter; 2463fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 2473fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void* parameter() const { 248958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 2493fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch return parameter_or_next_free_.parameter; 2503fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 251a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 252a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Accessors for next free node in the free list. 253a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Node* next_free() { 254b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(state() == FREE); 255a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return parameter_or_next_free_.next_free; 256a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 257a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block void set_next_free(Node* value) { 258b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(state() == FREE); 259a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block parameter_or_next_free_.next_free = value; 260a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 261a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 262014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch void MakeWeak(void* parameter, 263014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch WeakCallbackInfo<void>::Callback phantom_callback, 264014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch v8::WeakCallbackType type) { 265014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(phantom_callback != nullptr); 266958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 267014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch CHECK_NE(object_, reinterpret_cast<Object*>(kGlobalHandleZapValue)); 268958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier set_state(WEAK); 269014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch switch (type) { 270014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch case v8::WeakCallbackType::kParameter: 271014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch set_weakness_type(PHANTOM_WEAK); 272014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch break; 273014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch case v8::WeakCallbackType::kInternalFields: 274bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch set_weakness_type(PHANTOM_WEAK_2_INTERNAL_FIELDS); 275bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch break; 276bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch case v8::WeakCallbackType::kFinalizer: 277bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch set_weakness_type(FINALIZER_WEAK); 278bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch break; 279958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 280014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch set_parameter(parameter); 281bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch weak_callback_ = phantom_callback; 282bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } 283bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch 284bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch void MakeWeak(Object*** location_addr) { 285bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch DCHECK(IsInUse()); 286bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch CHECK_NE(object_, reinterpret_cast<Object*>(kGlobalHandleZapValue)); 287bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch set_state(WEAK); 288bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch set_weakness_type(PHANTOM_WEAK_RESET_HANDLE); 289bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch set_parameter(location_addr); 290bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch weak_callback_ = nullptr; 291958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 292958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 293b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void* ClearWeakness() { 294958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 295b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void* p = parameter(); 296b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_state(NORMAL); 297a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block set_parameter(NULL); 298b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return p; 299a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 300a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 301958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier void CollectPhantomCallbackData( 302014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Isolate* isolate, 303014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch List<PendingPhantomCallback>* pending_phantom_callbacks) { 304014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(weakness_type() == PHANTOM_WEAK || 305014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch weakness_type() == PHANTOM_WEAK_2_INTERNAL_FIELDS); 306014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(state() == PENDING); 307bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch DCHECK(weak_callback_ != nullptr); 308014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 309014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch void* internal_fields[v8::kInternalFieldsInWeakCallback] = {nullptr, 310014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch nullptr}; 311014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (weakness_type() != PHANTOM_WEAK && object()->IsJSObject()) { 312014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch auto jsobject = JSObject::cast(object()); 313014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch int field_count = jsobject->GetInternalFieldCount(); 314014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (int i = 0; i < v8::kInternalFieldsInWeakCallback; ++i) { 315014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (field_count == i) break; 316014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch auto field = jsobject->GetInternalField(i); 317014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (field->IsSmi()) internal_fields[i] = field; 318958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 319958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 320014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 321014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Zap with something dangerous. 322014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch *location() = reinterpret_cast<Object*>(0x6057ca11); 323014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 324014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch typedef v8::WeakCallbackInfo<void> Data; 325014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch auto callback = reinterpret_cast<Data::Callback>(weak_callback_); 326014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch pending_phantom_callbacks->Add( 327014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch PendingPhantomCallback(this, callback, parameter(), internal_fields)); 328014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(IsInUse()); 329014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch set_state(NEAR_DEATH); 330958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 331958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 332bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch void ResetPhantomHandle() { 333bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch DCHECK(weakness_type() == PHANTOM_WEAK_RESET_HANDLE); 334bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch DCHECK(state() == PENDING); 335bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch DCHECK(weak_callback_ == nullptr); 336bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch Object*** handle = reinterpret_cast<Object***>(parameter()); 337bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch *handle = nullptr; 338bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch Release(); 339bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } 340bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch 341b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool PostGarbageCollectionProcessing(Isolate* isolate) { 342014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Handles only weak handles (not phantom) that are dying. 343b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (state() != Node::PENDING) return false; 344b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (weak_callback_ == NULL) { 345b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Release(); 34650ef84f5fad2def87d3fbc737bec4a32711fdef4Kristian Monsen return false; 34750ef84f5fad2def87d3fbc737bec4a32711fdef4Kristian Monsen } 348b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_state(NEAR_DEATH); 349a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 350958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Check that we are not passing a finalized external string to 351958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // the callback. 352958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(!object_->IsExternalOneByteString() || 353958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier ExternalOneByteString::cast(object_)->resource() != NULL); 354958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(!object_->IsExternalTwoByteString() || 355958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier ExternalTwoByteString::cast(object_)->resource() != NULL); 356bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch if (weakness_type() != FINALIZER_WEAK) { 357bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch return false; 358bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } 359014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 360958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Leaving V8. 361958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier VMState<EXTERNAL> vmstate(isolate); 362958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier HandleScope handle_scope(isolate); 363bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch void* internal_fields[v8::kInternalFieldsInWeakCallback] = {nullptr, 364bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch nullptr}; 365bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch v8::WeakCallbackInfo<void> data(reinterpret_cast<v8::Isolate*>(isolate), 366bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch parameter(), internal_fields, nullptr); 367958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier weak_callback_(data); 368958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 3693ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // Absence of explicit cleanup or revival of weak handle 37050ef84f5fad2def87d3fbc737bec4a32711fdef4Kristian Monsen // in most of the cases would lead to memory leak. 371b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch CHECK(state() != NEAR_DEATH); 372a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return true; 373a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 374a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 375b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline GlobalHandles* GetGlobalHandles(); 376b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 3773fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch private: 3783fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch inline NodeBlock* FindBlock(); 379b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void IncreaseBlockUses(); 380b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void DecreaseBlockUses(); 3813fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 3823fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Storage for object pointer. 3833fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Placed first to avoid offset computation. 3843fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Object* object_; 385a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 3863fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Next word stores class_id, index, state, and independent. 3873fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Note: the most aligned fields should go first. 3883fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 3893fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Wrapper class ID. 39044f0eee88ff00398ff7f715fab053374d808c90dSteve Block uint16_t class_id_; 39144f0eee88ff00398ff7f715fab053374d808c90dSteve Block 3923fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Index in the containing handle block. 3933fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch uint8_t index_; 3943fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 395b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // This stores three flags (independent, partially_dependent and 396b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // in_new_space_list) and a State. 397958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier class NodeState : public BitField<State, 0, 3> {}; 398958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier class IsIndependent : public BitField<bool, 3, 1> {}; 399014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // The following two fields are mutually exclusive 400014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch class IsActive : public BitField<bool, 4, 1> {}; 401958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier class IsPartiallyDependent : public BitField<bool, 4, 1> {}; 402958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier class IsInNewSpaceList : public BitField<bool, 5, 1> {}; 403958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier class NodeWeaknessType : public BitField<WeaknessType, 6, 2> {}; 404a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 405b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uint8_t flags_; 406257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 407b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Handle specific callback - might be a weak reference in disguise. 408bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch WeakCallbackInfo<void>::Callback weak_callback_; 4093fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4103fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Provided data for callback. In FREE state, this is used for 411a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // the free list link. 412a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block union { 413a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block void* parameter; 414a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Node* next_free; 415a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } parameter_or_next_free_; 416a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 4173fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch DISALLOW_COPY_AND_ASSIGN(Node); 4183fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch}; 4193fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 420a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 4213fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochclass GlobalHandles::NodeBlock { 422a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block public: 4233fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch static const int kSize = 256; 424a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 425b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit NodeBlock(GlobalHandles* global_handles, NodeBlock* next) 426b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch : next_(next), 427b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch used_nodes_(0), 428b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch next_used_(NULL), 429b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch prev_used_(NULL), 430b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles_(global_handles) {} 431a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 4323fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void PutNodesOnFreeList(Node** first_free) { 4333fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (int i = kSize - 1; i >= 0; --i) { 4343fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch nodes_[i].Initialize(i, first_free); 435d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 4363fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 437d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 4383fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* node_at(int index) { 439b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(0 <= index && index < kSize); 4403fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch return &nodes_[index]; 4413fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 4423fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 443b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void IncreaseUses() { 444b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(used_nodes_ < kSize); 4453fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (used_nodes_++ == 0) { 446b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch NodeBlock* old_first = global_handles_->first_used_block_; 447b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles_->first_used_block_ = this; 4483fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch next_used_ = old_first; 4493fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch prev_used_ = NULL; 4503fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (old_first == NULL) return; 4513fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch old_first->prev_used_ = this; 452bb769b257e753aafcbd96767abb2abc645eaa20cBen Murdoch } 4533fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 454bb769b257e753aafcbd96767abb2abc645eaa20cBen Murdoch 455b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void DecreaseUses() { 456b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(used_nodes_ > 0); 4573fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (--used_nodes_ == 0) { 4583fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (next_used_ != NULL) next_used_->prev_used_ = prev_used_; 4593fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (prev_used_ != NULL) prev_used_->next_used_ = next_used_; 460b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (this == global_handles_->first_used_block_) { 461b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles_->first_used_block_ = next_used_; 462d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 463d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 4643fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 465d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 466b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GlobalHandles* global_handles() { return global_handles_; } 467b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 4683fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Next block in the list of all blocks. 4693fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* next() const { return next_; } 470d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 4713fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Next/previous block in the list of blocks with used nodes. 4723fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* next_used() const { return next_used_; } 4733fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* prev_used() const { return prev_used_; } 4743fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4753fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch private: 4763fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node nodes_[kSize]; 4773fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* const next_; 4783fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch int used_nodes_; 4793fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* next_used_; 4803fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* prev_used_; 481b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GlobalHandles* global_handles_; 4823fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch}; 4833fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4843fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 485b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochGlobalHandles* GlobalHandles::Node::GetGlobalHandles() { 486b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return FindBlock()->global_handles(); 487b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 488b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 489b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 4903fb3ca8c7ca439d408449a395897395c0faae8d1Ben MurdochGlobalHandles::NodeBlock* GlobalHandles::Node::FindBlock() { 4913fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch intptr_t ptr = reinterpret_cast<intptr_t>(this); 4923fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch ptr = ptr - index_ * sizeof(Node); 4933fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* block = reinterpret_cast<NodeBlock*>(ptr); 494b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(block->node_at(index_) == this); 4953fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch return block; 4963fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch} 4973fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4983fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 499b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::Node::IncreaseBlockUses() { 500b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch NodeBlock* node_block = FindBlock(); 501b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch node_block->IncreaseUses(); 502b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GlobalHandles* global_handles = node_block->global_handles(); 503b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles->isolate()->counters()->global_handles()->Increment(); 504b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles->number_of_global_handles_++; 5053fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch} 5063fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 5073fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 508b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::Node::DecreaseBlockUses() { 509b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch NodeBlock* node_block = FindBlock(); 510b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GlobalHandles* global_handles = node_block->global_handles(); 511b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch parameter_or_next_free_.next_free = global_handles->first_free_; 512b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles->first_free_ = this; 513b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch node_block->DecreaseUses(); 514b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles->isolate()->counters()->global_handles()->Decrement(); 515b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles->number_of_global_handles_--; 5163fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch} 5173fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 5183fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 5193fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochclass GlobalHandles::NodeIterator { 5203fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch public: 5213fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch explicit NodeIterator(GlobalHandles* global_handles) 5223fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch : block_(global_handles->first_used_block_), 5233fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch index_(0) {} 5243fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 5253fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch bool done() const { return block_ == NULL; } 5263fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 5273fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* node() const { 528b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!done()); 5293fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch return block_->node_at(index_); 5303fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 531d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 5323fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void Advance() { 533b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!done()); 5343fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (++index_ < NodeBlock::kSize) return; 5353fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch index_ = 0; 5363fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch block_ = block_->next_used(); 5373fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 5383fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 5393fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch private: 5403fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* block_; 5413fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch int index_; 5423fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 5433fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch DISALLOW_COPY_AND_ASSIGN(NodeIterator); 544d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block}; 545d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 546014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochclass GlobalHandles::PendingPhantomCallbacksSecondPassTask 547014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch : public v8::internal::CancelableTask { 548014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch public: 549014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Takes ownership of the contents of pending_phantom_callbacks, leaving it in 550014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // the same state it would be after a call to Clear(). 551014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch PendingPhantomCallbacksSecondPassTask( 552014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch List<PendingPhantomCallback>* pending_phantom_callbacks, Isolate* isolate) 553014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch : CancelableTask(isolate) { 554014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch pending_phantom_callbacks_.Swap(pending_phantom_callbacks); 555014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 556014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 557014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch void RunInternal() override { 558bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch TRACE_EVENT0("v8", "V8.GCPhantomHandleProcessingCallback"); 559014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch isolate()->heap()->CallGCPrologueCallbacks( 560014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch GCType::kGCTypeProcessWeakCallbacks, kNoGCCallbackFlags); 561014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch InvokeSecondPassPhantomCallbacks(&pending_phantom_callbacks_, isolate()); 562014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch isolate()->heap()->CallGCEpilogueCallbacks( 563014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch GCType::kGCTypeProcessWeakCallbacks, kNoGCCallbackFlags); 564014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 565014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 566014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch private: 567014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch List<PendingPhantomCallback> pending_phantom_callbacks_; 568014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 569014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DISALLOW_COPY_AND_ASSIGN(PendingPhantomCallbacksSecondPassTask); 570014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch}; 571014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 57244f0eee88ff00398ff7f715fab053374d808c90dSteve BlockGlobalHandles::GlobalHandles(Isolate* isolate) 57344f0eee88ff00398ff7f715fab053374d808c90dSteve Block : isolate_(isolate), 5743ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch number_of_global_handles_(0), 5753fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch first_block_(NULL), 5763fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch first_used_block_(NULL), 57744f0eee88ff00398ff7f715fab053374d808c90dSteve Block first_free_(NULL), 578b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch post_gc_processing_count_(0), 579bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch number_of_phantom_handle_resets_(0), 580b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_(kObjectGroupConnectionsCapacity) {} 58144f0eee88ff00398ff7f715fab053374d808c90dSteve Block 58244f0eee88ff00398ff7f715fab053374d808c90dSteve BlockGlobalHandles::~GlobalHandles() { 5833fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* block = first_block_; 5843fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch while (block != NULL) { 5853fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* tmp = block->next(); 5863fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch delete block; 5873fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch block = tmp; 5883fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 5893fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch first_block_ = NULL; 59044f0eee88ff00398ff7f715fab053374d808c90dSteve Block} 591d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 592d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 593a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockHandle<Object> GlobalHandles::Create(Object* value) { 5943fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (first_free_ == NULL) { 595b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch first_block_ = new NodeBlock(this, first_block_); 5963fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch first_block_->PutNodesOnFreeList(&first_free_); 5973fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 598b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(first_free_ != NULL); 5993fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Take the first node in the free list. 6003fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* result = first_free_; 6013fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch first_free_ = result->next_free(); 602b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch result->Acquire(value); 6033fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (isolate_->heap()->InNewSpace(value) && 6043fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch !result->is_in_new_space_list()) { 6053fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch new_space_nodes_.Add(result); 6063fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch result->set_in_new_space_list(true); 607a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 608a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return result->handle(); 609a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 610a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 611a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 612b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochHandle<Object> GlobalHandles::CopyGlobal(Object** location) { 613b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(location != NULL); 614b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return Node::FromLocation(location)->GetGlobalHandles()->Create(*location); 615b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 616b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 617b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 618a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid GlobalHandles::Destroy(Object** location) { 619b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (location != NULL) Node::FromLocation(location)->Release(); 620a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 621a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 622a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 623014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochtypedef v8::WeakCallbackInfo<void>::Callback GenericCallback; 624958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 625958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 626014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::MakeWeak(Object** location, void* parameter, 627014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch GenericCallback phantom_callback, 628014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch v8::WeakCallbackType type) { 629014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Node::FromLocation(location)->MakeWeak(parameter, phantom_callback, type); 630958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier} 631958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 632bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdochvoid GlobalHandles::MakeWeak(Object*** location_addr) { 633bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch Node::FromLocation(*location_addr)->MakeWeak(location_addr); 634bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch} 635958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 636b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid* GlobalHandles::ClearWeakness(Object** location) { 637b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return Node::FromLocation(location)->ClearWeakness(); 638a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 639a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 640a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 641257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdochvoid GlobalHandles::MarkIndependent(Object** location) { 6423fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node::FromLocation(location)->MarkIndependent(); 643257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch} 644257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 645257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 646b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::MarkPartiallyDependent(Object** location) { 647b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Node::FromLocation(location)->MarkPartiallyDependent(); 648a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 649a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 650a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 651b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochbool GlobalHandles::IsIndependent(Object** location) { 652b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return Node::FromLocation(location)->is_independent(); 653a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 654a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 655a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 656b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochbool GlobalHandles::IsNearDeath(Object** location) { 657b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return Node::FromLocation(location)->IsNearDeath(); 65844f0eee88ff00398ff7f715fab053374d808c90dSteve Block} 65944f0eee88ff00398ff7f715fab053374d808c90dSteve Block 66044f0eee88ff00398ff7f715fab053374d808c90dSteve Block 661b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochbool GlobalHandles::IsWeak(Object** location) { 662b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return Node::FromLocation(location)->IsWeak(); 6633fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch} 6643fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 665f91f0611dbaf29ca0f1d4aecb357ce243a19d2faBen MurdochDISABLE_CFI_PERF 666b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::IterateWeakRoots(ObjectVisitor* v) { 6673fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 668958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier Node* node = it.node(); 669958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (node->IsWeakRetainer()) { 670014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Pending weak phantom handles die immediately. Everything else survives. 671bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch if (node->IsPendingPhantomResetHandle()) { 672bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch node->ResetPhantomHandle(); 673bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch ++number_of_phantom_handle_resets_; 674bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } else if (node->IsPendingPhantomCallback()) { 675bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch node->CollectPhantomCallbackData(isolate(), 676bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch &pending_phantom_callbacks_); 677958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } else { 678958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier v->VisitPointer(node->location()); 679958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 680958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 681257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch } 682257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch} 683257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 684257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 6853fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochvoid GlobalHandles::IdentifyWeakHandles(WeakSlotCallback f) { 6863fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 6873fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->IsWeak() && f(it.node()->location())) { 6883fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch it.node()->MarkPending(); 689a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 690a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 691a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 692a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 693a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 6943fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochvoid GlobalHandles::IterateNewSpaceStrongAndDependentRoots(ObjectVisitor* v) { 6953fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 6963fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* node = new_space_nodes_[i]; 697014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (FLAG_scavenge_reclaim_unmodified_objects) { 698014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (node->IsStrongRetainer() || 699014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch (node->IsWeakRetainer() && !node->is_independent() && 700014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->is_active())) { 701b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch v->VisitPointer(node->location()); 702014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 703014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } else { 704014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (node->IsStrongRetainer() || 705014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch (node->IsWeakRetainer() && !node->is_independent() && 706014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch !node->is_partially_dependent())) { 707014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch v->VisitPointer(node->location()); 708014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 7093ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block } 7103ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block } 7113ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block} 7123ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block 7133ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block 7143fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochvoid GlobalHandles::IdentifyNewSpaceWeakIndependentHandles( 7153fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch WeakSlotCallbackWithHeap f) { 7163fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 7173fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* node = new_space_nodes_[i]; 718b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(node->is_in_new_space_list()); 719b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if ((node->is_independent() || node->is_partially_dependent()) && 720b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch node->IsWeak() && f(isolate_->heap(), node->location())) { 7213fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch node->MarkPending(); 722a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 723a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 724a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 725a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 726a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 7273fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochvoid GlobalHandles::IterateNewSpaceWeakIndependentRoots(ObjectVisitor* v) { 7283fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 7293fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* node = new_space_nodes_[i]; 730b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(node->is_in_new_space_list()); 731b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if ((node->is_independent() || node->is_partially_dependent()) && 732b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch node->IsWeakRetainer()) { 733014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Pending weak phantom handles die immediately. Everything else survives. 734bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch if (node->IsPendingPhantomResetHandle()) { 735bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch node->ResetPhantomHandle(); 736bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch ++number_of_phantom_handle_resets_; 737bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } else if (node->IsPendingPhantomCallback()) { 738014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->CollectPhantomCallbackData(isolate(), 739014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch &pending_phantom_callbacks_); 740014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } else { 741958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier v->VisitPointer(node->location()); 742014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 743014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 744014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 745014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} 746014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 747014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 748014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::IdentifyWeakUnmodifiedObjects( 749014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch WeakSlotCallback is_unmodified) { 750014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 751014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Node* node = new_space_nodes_[i]; 752014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (node->IsWeak() && !is_unmodified(node->location())) { 753014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->set_active(true); 754014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 755014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 756014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} 757014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 758014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 759014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::MarkNewSpaceWeakUnmodifiedObjectsPending( 760014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch WeakSlotCallbackWithHeap is_unscavenged) { 761014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 762014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Node* node = new_space_nodes_[i]; 763014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(node->is_in_new_space_list()); 764014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if ((node->is_independent() || !node->is_active()) && node->IsWeak() && 765014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch is_unscavenged(isolate_->heap(), node->location())) { 766014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->MarkPending(); 767014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 768014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 769014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} 770014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 771014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 772014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::IterateNewSpaceWeakUnmodifiedRoots(ObjectVisitor* v) { 773014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 774014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Node* node = new_space_nodes_[i]; 775014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(node->is_in_new_space_list()); 776014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if ((node->is_independent() || !node->is_active()) && 777014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->IsWeakRetainer()) { 778014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Pending weak phantom handles die immediately. Everything else survives. 779bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch if (node->IsPendingPhantomResetHandle()) { 780bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch node->ResetPhantomHandle(); 781bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch ++number_of_phantom_handle_resets_; 782bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } else if (node->IsPendingPhantomCallback()) { 783014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->CollectPhantomCallbackData(isolate(), 784014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch &pending_phantom_callbacks_); 785958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } else { 786014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch v->VisitPointer(node->location()); 787958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 788257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch } 789257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch } 790257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch} 791257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 792257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 793f91f0611dbaf29ca0f1d4aecb357ce243a19d2faBen MurdochDISABLE_CFI_PERF 794b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochbool GlobalHandles::IterateObjectGroups(ObjectVisitor* v, 795b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch WeakSlotCallbackWithHeap can_skip) { 796b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ComputeObjectGroupsAndImplicitReferences(); 797b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int last = 0; 798b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool any_group_was_visited = false; 799b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < object_groups_.length(); i++) { 800b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ObjectGroup* entry = object_groups_.at(i); 801b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(entry != NULL); 802b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 803b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object*** objects = entry->objects; 804b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool group_should_be_visited = false; 805b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (size_t j = 0; j < entry->length; j++) { 806b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* object = *objects[j]; 807b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (object->IsHeapObject()) { 808b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (!can_skip(isolate_->heap(), &object)) { 809b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group_should_be_visited = true; 810b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch break; 811b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 812b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 813b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 814b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 815b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (!group_should_be_visited) { 816b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_groups_[last++] = entry; 817b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch continue; 818b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 819b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 820b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // An object in the group requires visiting, so iterate over all 821b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // objects in the group. 822b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (size_t j = 0; j < entry->length; ++j) { 823b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* object = *objects[j]; 824b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (object->IsHeapObject()) { 825b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch v->VisitPointer(&object); 826b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch any_group_was_visited = true; 827b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 828b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 829b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 830b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Once the entire group has been iterated over, set the object 831b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // group to NULL so it won't be processed again. 832b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch delete entry; 833b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_groups_.at(i) = NULL; 834b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 835b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_groups_.Rewind(last); 836b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return any_group_was_visited; 837b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 838b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 8393b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochnamespace { 8403b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch// Traces the information about object groups and implicit ref groups given by 8413b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch// the embedder to the V8 during each gc prologue. 8423b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochclass ObjectGroupsTracer { 8433b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch public: 8443b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch explicit ObjectGroupsTracer(Isolate* isolate); 8453b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch void Print(); 8463b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8473b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch private: 8483b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch void PrintObjectGroup(ObjectGroup* group); 8493b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch void PrintImplicitRefGroup(ImplicitRefGroup* group); 8503b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch void PrintObject(Object* object); 8513b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch void PrintConstructor(JSObject* js_object); 8523b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch void PrintInternalFields(JSObject* js_object); 8533b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch Isolate* isolate_; 8543b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch DISALLOW_COPY_AND_ASSIGN(ObjectGroupsTracer); 8553b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch}; 8563b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8573b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben MurdochObjectGroupsTracer::ObjectGroupsTracer(Isolate* isolate) : isolate_(isolate) {} 8583b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8593b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid ObjectGroupsTracer::Print() { 8603b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch GlobalHandles* global_handles = isolate_->global_handles(); 8613b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8623b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintIsolate(isolate_, "### Tracing object groups:\n"); 8633b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8643b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch for (auto group : *(global_handles->object_groups())) { 8653b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintObjectGroup(group); 8663b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 8673b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch for (auto group : *(global_handles->implicit_ref_groups())) { 8683b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintImplicitRefGroup(group); 8693b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 8703b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8713b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintIsolate(isolate_, "### Tracing object groups finished.\n"); 8723b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 8733b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8743b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid ObjectGroupsTracer::PrintObject(Object* object) { 8753b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch if (object->IsJSObject()) { 8763b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch JSObject* js_object = JSObject::cast(object); 8773b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8783b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF("{ constructor_name: "); 8793b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintConstructor(js_object); 8803b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF(", hidden_fields: [ "); 8813b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintInternalFields(js_object); 8823b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF(" ] }\n"); 8833b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } else { 88413e2dadd00298019ed862f2b2fc5068bba730bcfBen Murdoch PrintF("object of unexpected type: %p\n", static_cast<void*>(object)); 8853b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 8863b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 8873b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8883b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid ObjectGroupsTracer::PrintConstructor(JSObject* js_object) { 8893b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch Object* maybe_constructor = js_object->map()->GetConstructor(); 8903b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch if (maybe_constructor->IsJSFunction()) { 8913b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch JSFunction* constructor = JSFunction::cast(maybe_constructor); 8923b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch String* name = String::cast(constructor->shared()->name()); 8933b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch if (name->length() == 0) name = constructor->shared()->inferred_name(); 8943b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8953b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF("%s", name->ToCString().get()); 89613e2dadd00298019ed862f2b2fc5068bba730bcfBen Murdoch } else if (maybe_constructor->IsNull(isolate_)) { 8973b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch if (js_object->IsOddball()) { 8983b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF("<oddball>"); 8993b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } else { 9003b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF("<null>"); 9013b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 9023b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } else { 9033b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch UNREACHABLE(); 9043b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 9053b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 9063b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 9073b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid ObjectGroupsTracer::PrintInternalFields(JSObject* js_object) { 9083b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch for (int i = 0; i < js_object->GetInternalFieldCount(); ++i) { 9093b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch if (i != 0) { 9103b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF(", "); 9113b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 91213e2dadd00298019ed862f2b2fc5068bba730bcfBen Murdoch PrintF("%p", static_cast<void*>(js_object->GetInternalField(i))); 9133b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 9143b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 9153b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 9163b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid ObjectGroupsTracer::PrintObjectGroup(ObjectGroup* group) { 917bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch PrintIsolate(isolate_, "ObjectGroup (size: %" PRIuS ")\n", group->length); 9183b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch Object*** objects = group->objects; 9193b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 9203b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch for (size_t i = 0; i < group->length; ++i) { 9213b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintIsolate(isolate_, " - Member: "); 9223b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintObject(*objects[i]); 9233b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 9243b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 9253b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 9263b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid ObjectGroupsTracer::PrintImplicitRefGroup(ImplicitRefGroup* group) { 927bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch PrintIsolate(isolate_, "ImplicitRefGroup (children count: %" PRIuS ")\n", 9283b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch group->length); 9293b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintIsolate(isolate_, " - Parent: "); 9303b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintObject(*(group->parent)); 9313b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 9323b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch Object*** children = group->children; 9333b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch for (size_t i = 0; i < group->length; ++i) { 9343b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintIsolate(isolate_, " - Child: "); 9353b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintObject(*children[i]); 9363b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 9373b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 9383b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 9393b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} // namespace 9403b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 9413b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid GlobalHandles::PrintObjectGroups() { 9423b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch ObjectGroupsTracer(isolate_).Print(); 9433b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 944b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 945014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::InvokeSecondPassPhantomCallbacks( 946014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch List<PendingPhantomCallback>* callbacks, Isolate* isolate) { 947014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch while (callbacks->length() != 0) { 948014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch auto callback = callbacks->RemoveLast(); 949014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(callback.node() == nullptr); 950014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Fire second pass callback 951014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch callback.Invoke(isolate); 952014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 953014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} 954014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 955014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 956958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernierint GlobalHandles::PostScavengeProcessing( 957958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier const int initial_post_gc_processing_count) { 958b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int freed_nodes = 0; 959958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier for (int i = 0; i < new_space_nodes_.length(); ++i) { 960958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier Node* node = new_space_nodes_[i]; 961958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(node->is_in_new_space_list()); 962958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (!node->IsRetainer()) { 963958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Free nodes do not have weak callbacks. Do not use them to compute 964958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // the freed_nodes. 965958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier continue; 966a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 967014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Skip dependent or unmodified handles. Their weak callbacks might expect 968014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // to be 969958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // called between two global garbage collection callbacks which 970958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // are not called for minor collections. 971014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (FLAG_scavenge_reclaim_unmodified_objects) { 972014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (!node->is_independent() && (node->is_active())) { 973014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->set_active(false); 974014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch continue; 975014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 976014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->set_active(false); 977014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } else { 978014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (!node->is_independent() && !node->is_partially_dependent()) { 979014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch continue; 980014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 981014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->clear_partially_dependent(); 982958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 983014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 984958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (node->PostGarbageCollectionProcessing(isolate_)) { 985958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (initial_post_gc_processing_count != post_gc_processing_count_) { 986958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Weak callback triggered another GC and another round of 987958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // PostGarbageCollection processing. The current node might 988958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // have been deleted in that round, so we need to bail out (or 989958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // restart the processing). 990958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return freed_nodes; 9913fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 992958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 993958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (!node->IsRetainer()) { 994958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier freed_nodes++; 995958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 996958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 997958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return freed_nodes; 998958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier} 999958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1000958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1001958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernierint GlobalHandles::PostMarkSweepProcessing( 1002958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier const int initial_post_gc_processing_count) { 1003958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier int freed_nodes = 0; 1004958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier for (NodeIterator it(this); !it.done(); it.Advance()) { 1005958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (!it.node()->IsRetainer()) { 1006958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Free nodes do not have weak callbacks. Do not use them to compute 1007958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // the freed_nodes. 1008958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier continue; 1009958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 1010014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (FLAG_scavenge_reclaim_unmodified_objects) { 1011014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch it.node()->set_active(false); 1012014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } else { 1013014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch it.node()->clear_partially_dependent(); 1014014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1015958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (it.node()->PostGarbageCollectionProcessing(isolate_)) { 1016958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (initial_post_gc_processing_count != post_gc_processing_count_) { 1017958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // See the comment above. 1018958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return freed_nodes; 1019d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 1020a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1021958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (!it.node()->IsRetainer()) { 1022958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier freed_nodes++; 1023958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 1024a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1025958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return freed_nodes; 1026958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier} 1027958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1028958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1029958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Berniervoid GlobalHandles::UpdateListOfNewSpaceNodes() { 10303fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch int last = 0; 10313fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 10323fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* node = new_space_nodes_[i]; 1033b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(node->is_in_new_space_list()); 1034b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (node->IsRetainer()) { 1035b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (isolate_->heap()->InNewSpace(node->object())) { 1036b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch new_space_nodes_[last++] = node; 1037b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch isolate_->heap()->IncrementNodesCopiedInNewSpace(); 1038b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } else { 1039b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch node->set_in_new_space_list(false); 1040b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch isolate_->heap()->IncrementNodesPromoted(); 1041b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 10423fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } else { 10433fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch node->set_in_new_space_list(false); 1044b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch isolate_->heap()->IncrementNodesDiedInNewSpace(); 10453fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 1046d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 10473fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch new_space_nodes_.Rewind(last); 1048014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch new_space_nodes_.Trim(); 1049958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier} 1050958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1051958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1052014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochint GlobalHandles::DispatchPendingPhantomCallbacks( 1053014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch bool synchronous_second_pass) { 1054958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier int freed_nodes = 0; 1055109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch List<PendingPhantomCallback> second_pass_callbacks; 1056014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch { 1057014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // The initial pass callbacks must simply clear the nodes. 1058014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (auto i = pending_phantom_callbacks_.begin(); 1059014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch i != pending_phantom_callbacks_.end(); ++i) { 1060014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch auto callback = i; 1061014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Skip callbacks that have already been processed once. 1062014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (callback->node() == nullptr) continue; 1063014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch callback->Invoke(isolate()); 1064109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch if (callback->callback()) second_pass_callbacks.Add(*callback); 1065014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch freed_nodes++; 1066014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1067958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 1068109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch pending_phantom_callbacks_.Clear(); 1069109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch if (second_pass_callbacks.length() > 0) { 1070014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (FLAG_optimize_for_size || FLAG_predictable || synchronous_second_pass) { 1071014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch isolate()->heap()->CallGCPrologueCallbacks( 1072014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch GCType::kGCTypeProcessWeakCallbacks, kNoGCCallbackFlags); 1073109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch InvokeSecondPassPhantomCallbacks(&second_pass_callbacks, isolate()); 1074014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch isolate()->heap()->CallGCEpilogueCallbacks( 1075014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch GCType::kGCTypeProcessWeakCallbacks, kNoGCCallbackFlags); 1076014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } else { 1077014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch auto task = new PendingPhantomCallbacksSecondPassTask( 1078109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch &second_pass_callbacks, isolate()); 1079014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch V8::GetCurrentPlatform()->CallOnForegroundThread( 1080014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch reinterpret_cast<v8::Isolate*>(isolate()), task); 1081014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1082958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 1083b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return freed_nodes; 1084a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1085a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1086a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1087014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::PendingPhantomCallback::Invoke(Isolate* isolate) { 1088014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Data::Callback* callback_addr = nullptr; 1089014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (node_ != nullptr) { 1090014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Initialize for first pass callback. 1091014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(node_->state() == Node::NEAR_DEATH); 1092014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch callback_addr = &callback_; 1093014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1094014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Data data(reinterpret_cast<v8::Isolate*>(isolate), parameter_, 1095014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch internal_fields_, callback_addr); 1096014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Data::Callback callback = callback_; 1097014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch callback_ = nullptr; 1098014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch callback(data); 1099014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (node_ != nullptr) { 1100014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Transition to second pass state. 1101014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(node_->state() == Node::FREE); 1102014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node_ = nullptr; 1103014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1104014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} 1105014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 1106014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 1107014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochint GlobalHandles::PostGarbageCollectionProcessing( 1108014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch GarbageCollector collector, const v8::GCCallbackFlags gc_callback_flags) { 1109958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Process weak global handle callbacks. This must be done after the 1110958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // GC is completely done, because the callbacks may invoke arbitrary 1111958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // API functions. 1112958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(isolate_->heap()->gc_state() == Heap::NOT_IN_GC); 1113958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier const int initial_post_gc_processing_count = ++post_gc_processing_count_; 1114958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier int freed_nodes = 0; 1115014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch bool synchronous_second_pass = 1116014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch (gc_callback_flags & 1117109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch (kGCCallbackFlagForced | kGCCallbackFlagCollectAllAvailableGarbage | 1118014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch kGCCallbackFlagSynchronousPhantomCallbackProcessing)) != 0; 1119014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch freed_nodes += DispatchPendingPhantomCallbacks(synchronous_second_pass); 1120014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (initial_post_gc_processing_count != post_gc_processing_count_) { 1121014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // If the callbacks caused a nested GC, then return. See comment in 1122014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // PostScavengeProcessing. 1123014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch return freed_nodes; 1124014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1125958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (collector == SCAVENGER) { 1126014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch freed_nodes += PostScavengeProcessing(initial_post_gc_processing_count); 1127958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } else { 1128014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch freed_nodes += PostMarkSweepProcessing(initial_post_gc_processing_count); 1129958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 1130958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (initial_post_gc_processing_count != post_gc_processing_count_) { 1131958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // If the callbacks caused a nested GC, then return. See comment in 1132958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // PostScavengeProcessing. 1133958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return freed_nodes; 1134958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 1135958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (initial_post_gc_processing_count == post_gc_processing_count_) { 1136958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier UpdateListOfNewSpaceNodes(); 1137958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 1138958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return freed_nodes; 1139958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier} 1140958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1141958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1142d0582a6c46733687d045e4188a1bcd0123c758a1Steve Blockvoid GlobalHandles::IterateStrongRoots(ObjectVisitor* v) { 11433fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 11443fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->IsStrongRetainer()) { 11453fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch v->VisitPointer(it.node()->location()); 1146a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1147a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1148a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1149a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1150d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 1151f91f0611dbaf29ca0f1d4aecb357ce243a19d2faBen MurdochDISABLE_CFI_PERF 1152d0582a6c46733687d045e4188a1bcd0123c758a1Steve Blockvoid GlobalHandles::IterateAllRoots(ObjectVisitor* v) { 11533fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 11543fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->IsRetainer()) { 11553fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch v->VisitPointer(it.node()->location()); 1156257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch } 1157257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch } 1158257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch} 1159257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 1160257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 1161f91f0611dbaf29ca0f1d4aecb357ce243a19d2faBen MurdochDISABLE_CFI_PERF 116244f0eee88ff00398ff7f715fab053374d808c90dSteve Blockvoid GlobalHandles::IterateAllRootsWithClassIds(ObjectVisitor* v) { 11633fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 1164b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (it.node()->IsRetainer() && it.node()->has_wrapper_class_id()) { 11653fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch v->VisitEmbedderReference(it.node()->location(), 11663fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch it.node()->wrapper_class_id()); 116744f0eee88ff00398ff7f715fab053374d808c90dSteve Block } 116844f0eee88ff00398ff7f715fab053374d808c90dSteve Block } 116944f0eee88ff00398ff7f715fab053374d808c90dSteve Block} 117044f0eee88ff00398ff7f715fab053374d808c90dSteve Block 117144f0eee88ff00398ff7f715fab053374d808c90dSteve Block 1172f91f0611dbaf29ca0f1d4aecb357ce243a19d2faBen MurdochDISABLE_CFI_PERF 1173b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::IterateAllRootsInNewSpaceWithClassIds(ObjectVisitor* v) { 1174b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 1175b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Node* node = new_space_nodes_[i]; 1176b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (node->IsRetainer() && node->has_wrapper_class_id()) { 1177b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch v->VisitEmbedderReference(node->location(), 1178b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch node->wrapper_class_id()); 1179b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1180b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1181b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1182b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1183b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1184f91f0611dbaf29ca0f1d4aecb357ce243a19d2faBen MurdochDISABLE_CFI_PERF 1185014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::IterateWeakRootsInNewSpaceWithClassIds(ObjectVisitor* v) { 1186014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 1187014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Node* node = new_space_nodes_[i]; 1188014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (node->has_wrapper_class_id() && node->IsWeak()) { 1189014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch v->VisitEmbedderReference(node->location(), node->wrapper_class_id()); 1190014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1191014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1192014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} 1193014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 1194014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 1195b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochint GlobalHandles::NumberOfWeakHandles() { 1196b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int count = 0; 1197b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 1198b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (it.node()->IsWeakRetainer()) { 1199b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch count++; 1200b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1201b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1202b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return count; 1203b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1204b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1205b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1206b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochint GlobalHandles::NumberOfGlobalObjectWeakHandles() { 1207b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int count = 0; 1208b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 1209b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (it.node()->IsWeakRetainer() && 1210b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch it.node()->object()->IsJSGlobalObject()) { 1211b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch count++; 1212b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1213b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1214b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return count; 1215b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1216b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1217b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1218d0582a6c46733687d045e4188a1bcd0123c758a1Steve Blockvoid GlobalHandles::RecordStats(HeapStats* stats) { 1219d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->global_handle_count = 0; 1220d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->weak_global_handle_count = 0; 1221d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->pending_global_handle_count = 0; 1222d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->near_death_global_handle_count = 0; 12233fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch *stats->free_global_handle_count = 0; 12243fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 1225d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->global_handle_count += 1; 12263fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->state() == Node::WEAK) { 1227d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->weak_global_handle_count += 1; 12283fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } else if (it.node()->state() == Node::PENDING) { 1229d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->pending_global_handle_count += 1; 12303fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } else if (it.node()->state() == Node::NEAR_DEATH) { 1231d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->near_death_global_handle_count += 1; 12323fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } else if (it.node()->state() == Node::FREE) { 12333fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch *stats->free_global_handle_count += 1; 1234d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 1235d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 1236d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block} 1237a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1238a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef DEBUG 1239a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1240a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid GlobalHandles::PrintStats() { 1241a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int total = 0; 1242a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int weak = 0; 1243a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int pending = 0; 1244a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int near_death = 0; 1245a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int destroyed = 0; 1246a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 12473fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 1248a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block total++; 12493fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->state() == Node::WEAK) weak++; 12503fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->state() == Node::PENDING) pending++; 12513fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->state() == Node::NEAR_DEATH) near_death++; 12523fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->state() == Node::FREE) destroyed++; 1253a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1254a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1255a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block PrintF("Global Handle Statistics:\n"); 1256bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch PrintF(" allocated memory = %" PRIuS "B\n", total * sizeof(Node)); 1257a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block PrintF(" # weak = %d\n", weak); 1258a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block PrintF(" # pending = %d\n", pending); 1259a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block PrintF(" # near_death = %d\n", near_death); 12603fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch PrintF(" # free = %d\n", destroyed); 1261a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block PrintF(" # total = %d\n", total); 1262a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1263a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1264b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1265a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid GlobalHandles::Print() { 1266a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block PrintF("Global handles:\n"); 12673fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 12683fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch PrintF(" handle %p to %p%s\n", 12693fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch reinterpret_cast<void*>(it.node()->location()), 12703fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch reinterpret_cast<void*>(it.node()->object()), 12713fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch it.node()->IsWeak() ? " (weak)" : ""); 1272a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1273a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1274a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1275a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 1276a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1277a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 127844f0eee88ff00398ff7f715fab053374d808c90dSteve Block 127944f0eee88ff00398ff7f715fab053374d808c90dSteve Blockvoid GlobalHandles::AddObjectGroup(Object*** handles, 128044f0eee88ff00398ff7f715fab053374d808c90dSteve Block size_t length, 128144f0eee88ff00398ff7f715fab053374d808c90dSteve Block v8::RetainedObjectInfo* info) { 1282257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch#ifdef DEBUG 1283257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch for (size_t i = 0; i < length; ++i) { 1284b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!Node::FromLocation(handles[i])->is_independent()); 1285257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch } 1286257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch#endif 12878b112d2025046f85ef7f6be087c6129c872ebad2Ben Murdoch if (length == 0) { 12888b112d2025046f85ef7f6be087c6129c872ebad2Ben Murdoch if (info != NULL) info->Dispose(); 12898b112d2025046f85ef7f6be087c6129c872ebad2Ben Murdoch return; 129044f0eee88ff00398ff7f715fab053374d808c90dSteve Block } 1291b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ObjectGroup* group = new ObjectGroup(length); 1292b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (size_t i = 0; i < length; ++i) 1293b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group->objects[i] = handles[i]; 1294b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group->info = info; 1295b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_groups_.Add(group); 129644f0eee88ff00398ff7f715fab053374d808c90dSteve Block} 129744f0eee88ff00398ff7f715fab053374d808c90dSteve Block 129844f0eee88ff00398ff7f715fab053374d808c90dSteve Block 1299b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::SetObjectGroupId(Object** handle, 1300b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch UniqueId id) { 1301b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_.Add(ObjectGroupConnection(id, handle)); 1302b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1303b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1304b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1305b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::SetRetainedObjectInfo(UniqueId id, 1306b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RetainedObjectInfo* info) { 1307b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_.Add(ObjectGroupRetainerInfo(id, info)); 1308b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1309b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1310b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1311b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::SetReferenceFromGroup(UniqueId id, Object** child) { 1312b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!Node::FromLocation(child)->is_independent()); 1313b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_.Add(ObjectGroupConnection(id, child)); 1314b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1315b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1316b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1317b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::SetReference(HeapObject** parent, Object** child) { 1318b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!Node::FromLocation(child)->is_independent()); 1319b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ImplicitRefGroup* group = new ImplicitRefGroup(parent, 1); 1320b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group->children[0] = child; 1321b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_groups_.Add(group); 1322a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1323a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1324a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1325a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid GlobalHandles::RemoveObjectGroups() { 1326b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < object_groups_.length(); i++) 1327b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch delete object_groups_.at(i); 132844f0eee88ff00398ff7f715fab053374d808c90dSteve Block object_groups_.Clear(); 1329b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < retainer_infos_.length(); ++i) 1330b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_[i].info->Dispose(); 1331b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_.Clear(); 1332b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_.Clear(); 1333b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_.Initialize(kObjectGroupConnectionsCapacity); 1334a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1335a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 133644f0eee88ff00398ff7f715fab053374d808c90dSteve Block 133744f0eee88ff00398ff7f715fab053374d808c90dSteve Blockvoid GlobalHandles::RemoveImplicitRefGroups() { 133844f0eee88ff00398ff7f715fab053374d808c90dSteve Block for (int i = 0; i < implicit_ref_groups_.length(); i++) { 1339b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch delete implicit_ref_groups_.at(i); 134044f0eee88ff00398ff7f715fab053374d808c90dSteve Block } 134144f0eee88ff00398ff7f715fab053374d808c90dSteve Block implicit_ref_groups_.Clear(); 1342b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_.Clear(); 134344f0eee88ff00398ff7f715fab053374d808c90dSteve Block} 134444f0eee88ff00398ff7f715fab053374d808c90dSteve Block 134544f0eee88ff00398ff7f715fab053374d808c90dSteve Block 13463fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochvoid GlobalHandles::TearDown() { 13473fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // TODO(1428): invoke weak callbacks. 13483fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch} 13493fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 13503fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 1351b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::ComputeObjectGroupsAndImplicitReferences() { 1352b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (object_group_connections_.length() == 0) { 1353b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < retainer_infos_.length(); ++i) 1354b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_[i].info->Dispose(); 1355b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_.Clear(); 1356b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_.Clear(); 1357b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return; 1358b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1359b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1360b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_.Sort(); 1361b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_.Sort(); 1362b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_.Sort(); 1363b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1364b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int info_index = 0; // For iterating retainer_infos_. 1365b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch UniqueId current_group_id(0); 1366b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int current_group_start = 0; 1367b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1368b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int current_implicit_refs_start = 0; 1369b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int current_implicit_refs_end = 0; 1370b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i <= object_group_connections_.length(); ++i) { 1371b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (i == 0) 1372b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_group_id = object_group_connections_[i].id; 1373b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (i == object_group_connections_.length() || 1374b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_group_id != object_group_connections_[i].id) { 1375b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Group detected: objects in indices [current_group_start, i[. 1376b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1377b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Find out which implicit references are related to this group. (We want 1378b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // to ignore object groups which only have 1 object, but that object is 1379b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // needed as a representative object for the implicit refrerence group.) 1380b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch while (current_implicit_refs_start < implicit_ref_connections_.length() && 1381b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_[current_implicit_refs_start].id < 1382b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_group_id) 1383b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ++current_implicit_refs_start; 1384b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_implicit_refs_end = current_implicit_refs_start; 1385b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch while (current_implicit_refs_end < implicit_ref_connections_.length() && 1386b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_[current_implicit_refs_end].id == 1387b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_group_id) 1388b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ++current_implicit_refs_end; 1389b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1390b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (current_implicit_refs_end > current_implicit_refs_start) { 1391b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Find a representative object for the implicit references. 1392b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch HeapObject** representative = NULL; 1393b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int j = current_group_start; j < i; ++j) { 1394b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object** object = object_group_connections_[j].object; 1395b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if ((*object)->IsHeapObject()) { 1396b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch representative = reinterpret_cast<HeapObject**>(object); 1397b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch break; 1398b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1399b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1400b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (representative) { 1401b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ImplicitRefGroup* group = new ImplicitRefGroup( 1402b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch representative, 1403b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_implicit_refs_end - current_implicit_refs_start); 1404b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int j = current_implicit_refs_start; 1405b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch j < current_implicit_refs_end; 1406b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ++j) { 1407b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group->children[j - current_implicit_refs_start] = 1408b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_[j].object; 1409b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1410b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_groups_.Add(group); 1411b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1412b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_implicit_refs_start = current_implicit_refs_end; 1413b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1414b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1415b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Find a RetainedObjectInfo for the group. 1416b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RetainedObjectInfo* info = NULL; 1417b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch while (info_index < retainer_infos_.length() && 1418b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_[info_index].id < current_group_id) { 1419b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_[info_index].info->Dispose(); 1420b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ++info_index; 1421b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1422b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (info_index < retainer_infos_.length() && 1423b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_[info_index].id == current_group_id) { 1424b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // This object group has an associated ObjectGroupRetainerInfo. 1425b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch info = retainer_infos_[info_index].info; 1426b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ++info_index; 1427b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1428b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1429b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Ignore groups which only contain one object. 1430b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (i > current_group_start + 1) { 1431b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ObjectGroup* group = new ObjectGroup(i - current_group_start); 1432b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int j = current_group_start; j < i; ++j) { 1433b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group->objects[j - current_group_start] = 1434b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_[j].object; 1435b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1436b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group->info = info; 1437b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_groups_.Add(group); 1438b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } else if (info) { 1439b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch info->Dispose(); 1440b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1441b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1442b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (i < object_group_connections_.length()) { 1443b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_group_id = object_group_connections_[i].id; 1444b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_group_start = i; 1445b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1446b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1447b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1448b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_.Clear(); 1449b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_.Initialize(kObjectGroupConnectionsCapacity); 1450b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_.Clear(); 1451b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_.Clear(); 1452b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1453b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1454b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1455b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochEternalHandles::EternalHandles() : size_(0) { 1456b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (unsigned i = 0; i < arraysize(singleton_handles_); i++) { 1457b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch singleton_handles_[i] = kInvalidIndex; 1458b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1459b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1460b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1461b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1462b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochEternalHandles::~EternalHandles() { 1463b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < blocks_.length(); i++) delete[] blocks_[i]; 1464b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1465b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1466b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1467b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid EternalHandles::IterateAllRoots(ObjectVisitor* visitor) { 1468b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int limit = size_; 1469b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < blocks_.length(); i++) { 1470b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(limit > 0); 1471b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object** block = blocks_[i]; 1472b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch visitor->VisitPointers(block, block + Min(limit, kSize)); 1473b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch limit -= kSize; 1474b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1475b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1476b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1477b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1478b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid EternalHandles::IterateNewSpaceRoots(ObjectVisitor* visitor) { 1479b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < new_space_indices_.length(); i++) { 1480b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch visitor->VisitPointer(GetLocation(new_space_indices_[i])); 1481b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1482b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1483b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1484b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1485b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid EternalHandles::PostGarbageCollectionProcessing(Heap* heap) { 1486b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int last = 0; 1487b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < new_space_indices_.length(); i++) { 1488b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int index = new_space_indices_[i]; 1489b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (heap->InNewSpace(*GetLocation(index))) { 1490b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch new_space_indices_[last++] = index; 1491b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1492b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1493b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch new_space_indices_.Rewind(last); 1494b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1495b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1496b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1497b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid EternalHandles::Create(Isolate* isolate, Object* object, int* index) { 1498b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK_EQ(kInvalidIndex, *index); 1499b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (object == NULL) return; 1500b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK_NE(isolate->heap()->the_hole_value(), object); 1501b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int block = size_ >> kShift; 1502b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int offset = size_ & kMask; 1503b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // need to resize 1504b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (offset == 0) { 1505b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object** next_block = new Object*[kSize]; 1506b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* the_hole = isolate->heap()->the_hole_value(); 1507b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MemsetPointer(next_block, the_hole, kSize); 1508b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch blocks_.Add(next_block); 1509b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1510b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK_EQ(isolate->heap()->the_hole_value(), blocks_[block][offset]); 1511b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch blocks_[block][offset] = object; 1512b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (isolate->heap()->InNewSpace(object)) { 1513b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch new_space_indices_.Add(size_); 1514b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1515b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch *index = size_++; 1516b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1517b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1518b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1519014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} // namespace internal 1520014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} // namespace v8 1521